IG9972BEN (2017-09) Plug-In Boards.om 13
6 Troubleshooting
In addition to the guidelines below, take the documentation of the other system
components into account (→ Literature 21).
Problem Possible cause Correction
Pirani reading too high Pirani gauge contami-
nated
Adjust Pirani measure-
ment circuit (→ 12)
Clean gauge (→ [3])
Replace gauge
Cold cathode reading
too high
Connector insulation
contaminated or moist
Clean insulation or re-
place connector
Air humidity
( leakage current)
Keep the air humidity low
Keep the equipment in
constant operation
Cold cathode reading
too low
Cold cathode gauge
contaminated
Clean gauge
(→ [4])
Replace ionization
chamber
Pirani can not be
adjusted
Incorrect combination
measurement board –
gauge – cable
Select correct
combination (→ 8)
Gauge severely contami-
nated
Clean or replace gauge
(→ [3])
Problem Possible cause Correction
Cold cathode constantly
indicates « »
(overrange), (even
though
Short circuit in the cold
cathode cable / gauge
Replace or repair the
cable / gauge
the pressure is within the
measuring range)
Cold cathode measure-
ment board defective
Replace the cold cathode
measurement
board(→ 8)
Cold cathode indicates
« » (underrange),
even though the pressure
No IKR gauge connected Connect the gauge
is within the measuring
range
Interruption in cold
cathode cable
Replace or repair the
cable
Cold cathode gauge
defective
Replace the gauge
(→ [4])
Cold cathode measure-
ment board defective
Replace the cold cathode
measurement board
(→ 8)
Problem Possible cause Correction
No communication Pin 2 and 3 of the inter-
face cable not crossed
Use the correct cable
Incorrect Baud rate Match Baud rate
Incorrect data format Adhere to the format
specified for the TPG300
(→ [1])
6.1 Operating and
Adjustment Problems
6.2 Defects
6.3 Problems with the
RS232C Interface
To Next Page
Loading...
